batch Extracting first page or Delete other pages

Hi all,
 
I know practically nothing about javascript, but from other posts like Thom Parker's tutorial (http://acrobatusers.com/tutorials/extracting-pages-pdf-acrobat-javascript), I know I can do what I need. Only I'm having trouble tweaking the script to suit my purposes.
 
I have several pdfs in a folder. I only need the first page for each. I don't care if I extract that first page, or delete all the others.
 
I've tried putting this in a batch process:
 
this.extractPages(0);
 
but it creates the temp file, and I don't get how to retain the filename based on the tutorial.
 
I tried this:
 
this.extractPages(0,5);
var cPath = oNewDoc.path.replace(oNewDoc.documentFileName,cFlName);
oNewDoc.saveAs(cPath);
 
but it doesn't work.
 
I also tried to modifying the loop and using the console, but I obviously don't know what I'm doing, so I'm getting an error.
 
Can someone tell me how to create a batch script that does this? Thank you.
 
I'm using Acrobat Pro 9.4.6